Slider for slide fasteners and method of making same



y21,1936. D. B. GILMORE 1 2,04 ,650

SLIDER FOI R SLIDE FASTENERS AND METHOD OF MAKING .SAME

Filed Sept. 6, 1934 INVENTOR.

Delbert B. Gilmore BY "p r I oRNEYs' I f trated oneembodiment of my invention.

Patented July 2 1, 1936 PATENT OFFICE snmsa roa suns res-ramps AND. METHOD or MAKING SAME Delbert a. Gilmore, ans re; asslgnor to Hookless Fastener Company, M poration of Pennsylvania eadville; Pa., a cor- Application September a. 19:4, sex-m No. 742,915

,8 Claims. (01. 29-14:)

My invention relates to sliders for slide fasteners and more particularly to an improved sheet metal slider and an improved method of making the same.

In sliders for slide iasteners there is adiilicult structural problem for the reason that there must be two wings held in accurately spaced relation but connected only by a narrow neck at one end of the structure. The narrow neck must be reinforced-in some way to take the relatively heavy bending stresses which may be applied to the slider through the pull tab., For this reason it has been dimcult to make sliders economically from sheet metal by simple punching and bending operations. Certain methods of makin sliders now used commerciallyare satisfactory and produce good sliders and are also relatively cheap as compared to riveting or casting operations.

My invention, however, aims to provide a still cheaper slider which can be completely formed by very simple punching and bending operations and in 'which the number of operations will be reduced to an absolute minimum. It is thought that with properly designed dies my slider may be formed completely except for the attaching of the pull tab, in two operations. namely, a punch press operation, in which the blank will be completely formed, and a bending operation for bending it to final shape.

In the accompanying drawing, I have illus- In this awi Fig. 1 is a perspective view of a completely formed blank ready for bending;

Fig. 2 is a longitudinal cross-section view of the blank in the latter stages of bending showing the bending tool;

Fig. 8 is a perspective view of a completed slider; and g Fig. 4 is a longitudinal cross-section.

The blank shown in Fig. 1 may be formed by a single operation in a suitable multiple die punch press; It consists of two wings, I, C connected by a narrow neck I, and having side flanges l for guiding the fastener members. On each side of the neck the wing material is indented forming 'V-shap'ed portions I, I0, located'midway between the side edges of thematerial, and extending well toward the middle of the slider. A tongue II is struck up from the indented portion and an aperhireduringthebendingopcration.

be formed by a combined punching and drawing operation.

After the blank is thus formed, it is ready for bending and is placed in a bending tool which bends it on a line half way between the ends of the blank, so that there is produced a fold it midway between the tongue II and aperture i2. During the bending the tongue passes through the aperture and is clinched over against the die 20, which may be formed with a suitable recess 2! for that purpose, as shownin Fig. 2. .The clinched over end is shown at It in Figs. 3 and 4. In the finished slider,-it lies in the recess i8, which is formed in the indentingof the portions of the wing material adjacent the folded neck I. 'The pull tab I1 is next attached to the loops ii in a known'manner, and the slider is complete and ready for use.

In its final bent form the slider consists of the two wings 5 and 6 spaced apart to provide a channel to receive the fastener members with the indented portions lying closely in contact and serving as a spreader portion for separating the fastener members. The prong II serves as a strong reinforcing connection at a point spaced from the folded neck It sufiiciently to reinforce the slider against all normal bending stresses.

By having the reinforcing connection in the form of a prong extending from one layer of material through an opening in a contacting layer.

of material, it is easy to clinch the end of the prong over against the die without requiring a I special operation for guiding a riveting member into position and riveting it in place.

While I have shown and described in this appiication one embodiment which my invention may assume in. practice, it will be understood that this embodiment is merely for the purposes of. illustration and description, and that various other forms may be devised within the scope of my invention as defined in the appended claims.

'What I claim as my invention is:

, 1. A'method of making sliders for slide fasteners consisting of forming a sheet metal blank with a pair of wings connected by a narrow neck, indenting the neck and adjacent portions of the wingmaterial out of the plane'oi the wings, striking up an integral tongue from the indented portion on one side of the neck and forming an aperture on the other side of the neck, and then bending said blank double about a line midway between said tongue and aperture and simultaneously clinching said tongue on the outer surface of the slider as it passes through the portion and extending through an opening in the r 2. A slider for slide fasteners comprising parallel wings spaced apart to receive fastener members between them, and a bent neck-integrally uniting said wings at one end, the portions of said wings adjacent the neck being' indented inwardly toward each other, to provide a spreader portion for separating the fastener members, and an integral tongue struck from and extendin directly from one of said indented portions toward and through the opposite indented portion and clinched over on its outer surface to form a reinforcingeonnection for said wings at a point spaced from the neck.

8; A slider for slide fasteners consisting of asingle piece of sheet material having p'arallel wings spaced apart to receive fastener members between them, a bent neck integrally uniting said wings at one end, a portion of the sheet material of at least one of the wings being indented toward the other wing to provide a spread-'- er portion for separating the fastener members, and an integral tongue struck from said indent:

'ed portion and extending directly toward and through the opposite wing.

4. A slider for slide fasteners consisting of a wing, said tongue being clinched over the outer surface of said opposite wing;

5. A slider for slide fasteners consisting'of a single piece of 'sheet material having parallel wings spaced apart to receive members between them, the portions of wing material adjacent one end being indented inwardly toward each other to form a spreader for separating the histener members, said indented portions being-integrally united by a fold of the material. and a reinforcing connection spaced from said fold I, comprising a tongue struck up from one indented otherindented portion and clinched over the outer surface of said other indented portion.

6. A slider for slide fasteners consisting of a single piece of sheet material having parallelwings spaced apart to receive members between them. said wings adjacent one end and midway between the side edges having V-shaped indents in contact with each other to form a spreader portion for separating the fastener members, said indents being integrally united by a fold of the material, a tongue located adjacent the point of the V-shaped indents extending directly from one indent toward and through an opening in the opposite indent and clinched over the outer surface thereof to reinforce said fold.

7. A slider for slide fasteners consisting of a single 'piece of sheet material having parallel wings spaced apart to receive members between them, the portions of wing material adjacent one end midway between the sides of the slider being indented inwardly to form a spreader portion for separating the fastener members internally of the slider, and a recess externally of the slider a fold integrally uniting said indented portions at one end of the slider, and a tongue through an opening in the opposite indented portion, the projecting end of said tongue being bent over into the external recess.

8. A slider for slide fasteners consisting of a single piece of sheet material having parallel .wings spaced apart to receive membersbetween them, the portions of wing material adjacent one end being indented inwardly toward each other to form a spreader for separating the fastener members, said indented'portions being integrally united by a fold of' the material, a reinforcing taching loop struck up from one wing, and a pull I tab attached thereto.

Drum-r n. (muons.

struck up from one indented portion and extend- 

